Oxidative dimerization of methane over magnesium and calcium oxide catalysts promoted with group IA ions: the role of (M/sup +/O/sup -/) centers

Journal Article · Wed Aug 05 00:00:00 EDT 1987 · J. Am. Chem. Soc.; (United States)

DOI:https://doi.org/10.1021/ja00250a009· OSTI ID:6086217

Lin, C; Ito, T; Wang, J; Lunsford, J H

The oxidative dimerization of CH/sub 4/ to C/sub 2/H/sub 4/ and C/sub 2/H/sub 6/ over MgO and CaO is strongly influenced by certain group IA ions which are employed as promoters. Lithium is an effective promoter for MgO, but sodium and potassium are not; all three group IA ions are effective promoters for CaO. Centers of the type (M/sup +/O/sup -/) (M/sup +/ is a substantial group IA ion) are present in each active and selective catalyst, which supports the hypothesis that these centers are active for the formation of CH/sub 3//sup ./ radicals and, therefore, in the overall oxidative dimerization reaction.

• Research Organization: Texas A and M Univ., College Station
• OSTI ID: 6086217
• Journal Information: J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 109:16; ISSN JACSA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKALI METALS
ALKALINE EARTH METAL COMPOUNDS
ALKANES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CATALYSIS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
DATA
DIMERIZATION
ELEMENTS
EXPERIMENTAL DATA
FLOW RATE
HIGH TEMPERATURE
HYDROCARBONS
INFORMATION
LITHIUM
LOW PRESSURE
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
METALS
METHANE
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLYMERIZATION
POTASSIUM
PROMOTERS
RADICALS
SODIUM
SURFACE AREA
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
YIELDS